The hot topic on Capitol Hill is negative interest rates.

With central banks in Europe and Asia increasingly turning to the once unthinkable monetary policy to help jumpstart their moribund economies, lawmakers on Capitol Hill were keen to know, during a series of Congressional hearings Wednesday and Thursday, if Fed Chair Janet Yellen would consider forcing rates negative here in America.

Her answer was that the Fed isn’t taking negative rates off the table, but that she and her colleagues don’t think it will be necessary.

Negative interest rates would force banks to basically pay people for taking out a loan and charge people for leaving money in a savings account. So it would involve some adjustments to the financial system.

But what we should all be hoping for is a Federal Reserve that is preparing to take far bolder action than setting interest rates a few dozen basis points below zero. The experience of quantitative easing here and abroad, and the experience of negative interest rates in places like Japan and Europe, should be evidence enough that such a policy wouldn’t be nearly enough to jumpstart growth if the recession that Wall Street is fearing comes to fruition.

As former Treasury Secretary Larry Summers has pointed out, “History suggests that when recession comes it is necessary to cut rates more than 300 basis points.” Given how the Fed has struggled to justify raising rates even 25 basis points above zero, it’s highly unlikely that the Fed will be able to lower interest rates enough to bring the economy back into equilibrium, even if the central bank does decide to follow its peers into slightly-negative territory.

Pushing rates as low as 2 or 3 percent below zero, as I have explained before, would require a radical change in the public’s relationship with paper money:

As it stands now, the government guarantees that the nominal return on paper money is at least zero. But if the laws were changed so that paper money was not required to be accepted for “all debts public and private,” and the central bank was allowed to dictate new values of paper money, the Fed could engineer significantly negative interest rates. For instance, if the central bank were able to declare that a person depositing $100 in cash could only receive a credit of $98 when he deposited that money, that would in effect be the same as setting short-term interest rates at negative 2%.

And remember that would likely be on top of ATM charges and all the other fees we now pay banks. So there is a question of whether people would start to avoid banks.

But assuming they don’t, making such a change might be smart on its own terms. Nonetheless, it’s likely that come the next recession there will be limited political will for radical new government programs aimed at stimulating the economy. Considering that much of America met the Fed’s quantitative easing programs with reactions ranging from mistrust to outright apocalypticism, one can imagine how those same folks would react to the end of paper money as we know it.

Furthermore, there’s a much more elegant solution to the world’s economic problems that will only become more appealing if we suffer another global recession. All across the world, whether it’s Japan, China, Europe, or the U.S., economies are suffering from the twin economic ills of disinflation and too much debt. Another recession would only compound these problems. An obvious solution then is for central banks to support spending by the government by directly financing government programs, or by simply handing out money to citizens for them to spend.

This was labeled “helicopter money” by economist Milton Friedman when he argued that central banks could always fight deflation because at the last resort they could simply drop money out of helicopters. It is an idea that has been championed by British Labor Party leader Jeremy Corbyn when he advocated for “People’s QE,” or a central-bank financed program of infrastructure projects that could boost employment, economic growth, and inflation at the same time.

When the next recession hits, governments around the world will need to find the political will and the resources to engage in massive spending to drag their economies out of their demand-deficient comas. Given the high level of debt on government and private balance sheets, central banks can play a vital role in financing this spending. And such a partnership would be much more effective than simply reducing interest rates further.